The topography of the Atlantic Ocean bottom is shown as if the ocean had been removed.
The blue lines indicate the edges of the ocean tectonic plates. The yellow dots indicate
locations of earthquakes that have occurred in the period 1960 to 1985. The red triangles
are the locations of volcanic eruptions that have occurred in the period 1980 to 1995. Both
the earthquakes and the volcanic eruptions follow the plate boundaries.